Based on the introduction and cultivation of Alisma germplasm which were from Fujian, Jiangxi and Sichuan provinces, the biological characteristics, morphological characteristics and quality were observed and studied. After three-year continuous experiment and monographic study, there were remarkable difference in the biological characteristics, morphological characteristics and product quality of Fujian Alisma, Sichuan Alisma and Jiangxi Alisma. Fujian Alisma and Jiangxi Alisma were the same plant species of A. orientalis, whereas Sichuan Alisma and Fujian Alisma were the different plant species of A. plantago-aquatica. The study results will provide the theoretical and practical basis for the genuine medicinal materials research and good agricultural practice (GAP) of Alisma.
Alisma ; chemistry ; genetics ; growth & development ; China ; Drugs, Chinese Herbal ; analysis ; Quality Control

Objective:To compare the biomechanical properties of posterolateral distal humeral plate, inverted anterior proximal humerus internal locking system (PHILOS), and anterior reconstruction plate in the treatment of distal humeral shaft fractures by a finite element analysis.Methods:One healthy adult male volunteer, aged 27 years, with a height of 171 cm and a weight of 70 kg, was recruited for this study. The finite element method was used to establish a simulation model of distal humeral shaft fracture. The maximum displacement and maximum stress were compared between fixation with posterolateral distal humeral plate (group A), fixation with inverted anterior PHILOS (group B), and fixation with anterior reconstruction plate (group C).Results:In groups A, B, and C, respectively, the overall stress peak values were 409.07 MPa, 217.04 MPa, and 370.64 MPa; the peak stresses under torsional load were 234.55 MPa, 348.80 MPa and 458.17 MPa; the overall stress peaks under bending load were 250.22 MPa, 466.76 MPa, and 582.32 MPa. The smaller the stress, the smaller the risk of fatigue fracture. In groups A, B, and C, respectively, the overall displacement peak values were 5.18 mm, 3.04 mm and 3.75 mm; the peak displacements under torsional load were 1.20 mm, 1.02 mm and 2.05 mm; the peak displacements under bending load were 3.85 mm, 5.28 mm and 9.04 mm. The smaller the displacement, the better the fixation stability.Conclusions:In the treatment of distal humeral shaft fractures, fixation with inverted anterior PHILOS leads to the best mechanical stability under axial compression and torsional stress, while fixation with the posterolateral distal humeral plate leads to the best mechanical stability under bending stress.